Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde0594f78287c65…

MALICIOUS

PDF

79.9 KB Created: 2021-05-06 18:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ea0d887af818aadf05961c748f9f0607 SHA-1: 5ef4803a745c7059c2e932c0867d5e64dc459e47 SHA-256: cde0594f78287c65ad1dafdf684c4d217b395eb96c0879808e47ee337d95ab0a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/strik?utm_term=how+to+get+rid+of+echo+on+plantronics+headset PDF link annotation
    • https://cdn.sqhk.co/vejuwipem/hgRhgRE/emergency_vet_near_me_affordable.pdfIn PDF document text
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/nujitoruw.pdfIn PDF document text
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/8587867.pdfIn PDF document text
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/1411576.pdfIn PDF document text
    • https://lanufuxag.weebly.com/uploads/1/3/0/9/130969896/favawigexubopu-mibaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/JDAcojf/housecall_providers_of_oklahoma.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/dgcie94/pictoword_level_87_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/anheha5/jewel_hunter_lost_temple_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92723513-f650-4bd3-9c47-972a669f5be6/technical_analysis_candlestick_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/nike_size_guide_mens_shorts.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/mepezezurepovevepuji.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/dukekuvefarejuxubodifo.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/84880982195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32889c48-df7a-4151-b669-daf9b045c79b/what_is_the_best_low_carb_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/online_laboratory_reports_fmh.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/86799512937.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/medicinal_plants_information_henna.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/types_of_narrative_structure_in_novels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5fed13-a6ea-4624-8401-778639115c88/que_significa_cuando_sueas_que_tu_pareja_te_es_infiel.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/gdpr_policy_for_small_business_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/jasperreports_library_6._9._0.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/sifivom.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/digital_marketing_officer_salary_in_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/assessment_form_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/how_to_put_bobbin_back_in_brother_sewing_machine.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 5468 bytes
SHA-256: 779f0bec4d0a4eae1f2f1f54bc7186b442af482a192cfc3828c88657f7d1006e
font_01_sfnt_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 11176 bytes
SHA-256: c05c9c0a52c7c89b0373b3fca254f42ad89ab00a65a85b087d7a6c37fac9cf75

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